@thomasfuchs someone ran a custom single threaded Dhrystone benchmark against various computers he used since 1976 - not sure if this is of interest? It isn't optimised and so gains from this and multi threading would be much better these days.

(Updated with a better source which includes a list of results and link to the GitHub repo for the benchmark)

https://hothardware.com/news/dhrystone-benchmarks-1976-today